Former FBI deputy director Andrew McCabe kept memos of his interactions with President Trump, a person familiar with the matter told USA TODAY.

The Associated Press, CNN, The New York Times and The Washington Post all reported on the existence of the memos and cited anonymous sources close to the case and the now-fired McCabe.

During his encounters with Trump while serving as acting FBI director, McCabe documented those interactions, said the person familiar with the matter. The person who is not authorized to comment, said that McCabe — like former FBI director James Comey — kept notes of those interactions.

It's unclear how many memos there are and their exact contents, but they were reportedly handed over to Special Counsel Robert Mueller, who has been leading a wide-ranging investigation into Russian interference in the 2016 presidential election, ties between the Trump campaign and Russia, and possible obstructions of justice.

President Trump tweeted Sunday he doubts the memos exist.

"Spent very little time with Andrew McCabe, but he never took notes when he was with me. I don’t believe he made memos except to help his own agenda, probably at a later date. Same with lying James Comey. Can we call them Fake Memos?" Trump tweeted.

Spent very little time with Andrew McCabe, but he never took notes when he was with me. I don’t believe he made memos except to help his own agenda, probably at a later date. Same with lying James Comey. Can we call them Fake Memos?

Comey, McCabe's former boss, also kept memos where he detailed his meetings with the president, including Trump's alleged requests for Comey's personal "loyalty" and to drop his investigation into former national security adviser Michael Flynn.

Several media organizations, including USA TODAY, sued to have the memos released, but a judge rejected the suit, explaining they could affect the Russia investigation.

The New York Timesreported McCabe’s memos detail his interactions with the president and Comey. They were left at the FBI and could be used to corroborate information Comey laid out in his memos.

McCabe was said to have had at least three meetings with the president, including one where Trump allegedly asked him who he voted for in the presidential election, the newspaper reported.

In a stunning move late Friday, Attorney General Jeff Sessions announced he had fired McCabe. The move came a little more than a day before McCabe's retirement benefits would have kicked in.

Sessions, in a statement, said McCabe's firing was the result of an "extensive and fair" probe of alleged misconduct, which concluded that he had made "an unauthorized disclosure to the news media and lacked candor — including under oath — on multiple occasions."

McCabe announced his intention to retire in January.

After news of his firing, Trump applauded the decision and called it "a great day for the hard working men and women of the FBI."

McCabe shot back and said he held the post of deputy director during a "particularly tough time."

"Articles too numerous to count have leveled every sort of false, defamatory and degrading allegation against us," he said in a statement."The president's tweets have amplified and exacerbated it all. He called for my firing. He called for me to be stripped of my pension after more than 20 years of service."

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